Centrifugal machine with direct motor drive



MA1-cb 17,A 1925.

C. G. T. SALENIUS CENTRIFUGAL MACHINE WITH DIRECT MOTOR DRIVE Filed 5.Inizia 5, 1924 Patented Mar. `17, 1925.

STATES CARI.v GUsTAvTHRo-BJRN' sALnNIUs, on Bonus, swEDnN, AssIGNoR Y soHAF'r non TECHNIK M. n. on :ennlItN,4 GERMANY;

miam

CENTRINUGAI. MACHINE Lwrr'n manor iaoroannrvn.

Application filed `June 3,

T0 all whomy it may concern.' f

Beit known that I, CARL GUsTAv Timon- JRN' SALnNrUs, a subject ofthe King of Sweden, residing at Bohus, Sweden, ha-veilt Vvented certain new and-useful Improvements in CentrifugalMachines with Direct Motor Drives, of which the yfollowing isa specification.` x

My linvention' relates to anV4 improved centrifugal machine including a motor,.pref erably an electric-motor, directly connected therewith, andfmore particularly to alma chine ofthe stated kind forseparating or treating liquids.

' .There are two chines having a -direct motor device and adapted for separating purposes, whichare clearly distinguished from each. other as regards the particular purpose andthe inode off'operation. The one type is constructed and intended for use in separating moisture orv water from solid materialsor goods,. A

lobjectionable, and fallin machines vof the chemical substances, granular. or lumpy'materials, textilevgoods andthe like,iinclusive of separating types for chemical salts. Machinesf of this type usually comprise. a. separating rotary cylinder'of' a'relatively large diameter and, for this reason, do'not require a high number' of' revolutions in order to work satisfactorily. On the other hand machines of this type cannot stand high velocities, say of about 10,00() revolutions per minute, Vbut necessarily must lremain within the limits of a few-hundred to at the highest 2000 revolutions per minute Y for the "reason that any greater speed will 'produce heavy jerks andA shocks in the machine and damage the same on account of unequal location and unevenweight ofthe solid material in they revolving cylinder or drum which cannotl be avoided v The other type' of the said centrifugal machines `mainly servesffor separatingfliq generally speaking, to

uids of diii'erentspeciic gravity-or liquids from solidv matter containedtherein inthe form `of minute particles;` in particular machines of this type are used for -creaming olf milk,` purifying oils and the like andthe must be given a speedby 'far injezcess of 'that' of the first named type or class,"thespeed amounting,

l 6000 to HOOG-revolutions per minute',l depending'upon the' Yeine of types of centrifugal yma-l 1924. .Serial No. 717,636.

the'm'achine. Aspunequal` location or distri,- bution of the matter treated in the machine practically cannot occur owing to the -liquid ro,` sesam-1 .state of said matter, 'difficulties of constructfing a machine of thisclassj mainly resi-dev 1n avoiding kany dilferences of wei'ght in` the body ofthe machineitself and particularly any vibrations and quick oscillations,y which would readily setv in owing to the high speed of the machine, .in order toprevent at l'the same time thev machine from damage and 'precious wear, to ensure a reliable operation and to obtain a correct centrifugal action or separation ofthe. lconstituents of the treated liquid. For it has been found thatin 'order to accomplish this purpose the machine must be so constructed and arranged as to` run thoroughly free from vibrations.)

y For the stated reasons it lwill be easily understood :that the constructional means .employed in centrifugal machines intended for rainning at a relativelylowy yspeed, are

hereinbefore stated high speeds. This is lmainly due to the difference or purpose, las p already intimated, further to the special construction and arrangement of .thev rotary.`

l,pension of the revolving system lwith the rotary drum arranged ata low level are not applicable.

VThe object of ymy invention isto provide'a quick running machine of theki-nd which is.

,easily constructedand in which the movement of the revolving vessel is absolutely free from vibrations. With this aim in v view I support the casing ofthe motor, on a surface of theform of'an open shell, so as to "be 4 'movable thereon and with` the centre of gravity of the revolving system situated over and 'above the saidsupporting surface and preferablyv below the'centre of` the` spherical vconcavity ofthe said shell." Further objects and advantagesfof the invention will beset forth in the detailed description which'now follows. f wfrhefvampqs features lnvel'ltlOIl T0 embodied in the machine diagramniatically shown on the acoi'npanying drawing in which- Figure l is a sectional view of the machine and Figures 2 modifications. i

The electric motor of the machine may be of any conventional type comprising a stator ct and a rotor c mounted with its vertically projecting shaft f to directly drive the rotary drum or vessel CZ. The motor is-inovably supported on a bearing surface orinarginal flange e of the frame or bed Z) of the achine and this bearing surface constitutes, in cooperation with the correspondingly shaped supporting member or disc g of the motor, the. main feature of the invention. The bearing surface e is in the form of a shell the central portion of which is removed' for the motor to depend therethrough, as will be clearly understood from Figure l of the drawing, so that the surface e in reality consists ofan annular segment of a shell or calotte. Preferably I give the and 3 are sectional views of shell a spherical inner surface but any other suitable shape of geometrical nature such as a parabolic or conical form may be employed instead.

'The revolving system of the machine comprises the rotor c, the shaft f and the drum or vessel CZ revolving therewith. Owing to the relatively great weight of the latter the centre of gravity of the system is situated over and above the supportingl surface or flange e. The radius of curvature of the shell or surface e is relatively very `great so that, in case of the preferred construction of the shell as an -annular .portion of a sphere, the centre of said sphere will he considerably remote over and above the centre of gravity of the system. its above stated, the motor is movably supported by the surface e. In order to limit the n'iovability, howover, stops or abutments may be provided on the surface e which are not shown iin the drawing as the arrangement and operation thereof will be readily understood by persons skilled in the art without illustration. Further resilient or elastic members, such as springs h or rubber pads i, maybe inserted intermediate between the contacting 'fsurfaces of the supporting' shell and the laterally projecting member g of the motor for the purpose of mitigating` shocks that may 00CHF O11 CGli/dilll OCCtlSlOllS SllCll 3S 21 ililllS" port.

In some cases I find it advisable -to provide resilient guiding means at the lower end of the shaft of the motor, or to mount thel lower end of the shaft in a resilient bearing 'or on a suitable spring. The drum or vessel d is supported by the shaft of the motor and this may he advantageously done by suspending the same on the top of the shaft by means of a rigid connection, prefern ably, however, the connection maybe such that the drum or vessel will be adapted to freely oscillate about a point or centre that is fixed or approximately fixed with relation to the shaft.

In the latter case there are two different movements possibleapart from the revolution of the rotor and the drum or vesselthat is to say, the oscillation of the drum or vessel on and relatively to the yshaft of the rotor and the oscillating adjustment of the whole of the motor about a fixed or'approximately fixed point in the alignment of the axis yof the motor shaft.

In operation however, a. machine con-` structed in accordance with my invention as hereinbefore set forth does `not allow the revolving system to undergo any oscillations of its own, on the contrary, the revolving parts of the machine are running without the occurrence of shocks or vibration even at highest speed. For this reason any improved centrifugal machine, although adapted and intended for use as a high speed separator for treatin-g vliquids of any'suitable kind, still is of special advantage as a milk separator.

i I have not attempted to explainall of ythe `minute details of the construction ofthe machine, for it will be understood by those, to whom this specification is addressed, that the parts will necessarily be of the proper size and relationship, and will be properly mounted and arranged -according to thetenets of machine construction, nor have I attempted to illustrate the parts in theirieXact sizes and dimensions as thev drawing is of diagrammatic nature only and many of the parts are conventionally shown.

I find it also unnecessary to reiterate the operation of the machine, for the 'operation of the several parts has been described in detail. Nor does it seem necessaryto burden this specification with an exposition of the many advantages which the invention possesses, for they will be app-arent toV those versed in the art to whichthis invention relates. f

`What I claim is 1. A centrifugal machine comprising a hollow frame having an annular marginal hearing iiange g, a supporting disc rest-ing on said flange; a motor secured to the underside of said supporting disc and projecting into said frame.; and a shaft having a vessel at its upper end rotatably supportedA in said disc, said disc allow-ingoscillation lof said vessel and its shaft.

2. A centrifugal machine of the type set forth comprising, in combination, a revolving vessel, a motor mounted and arranged .to directly drive said vessel, a frame for the reception of the vsaid motor, and annular bearing flange on the said lframe for movably supporting the said motor,

face for ient means on the Said bearing yieldingly support-ing the motor.

3. A centrifugal machine of thetype set 'forth comprising, in combination, a revolving Vessel, a motor mounted and arranged to directly drive Said Vessel, avertical motor shaft connected to and carrying the said vessel loosely so as to allow the latter to os-l cillate, "a frame for the reception of the said 10 motor, an annular bearing flange on the said frame for movably carrylng the lsaid motor, a-nd resilient means on the said bearing face for yieldingly supporting the said motor.

In testimony whereof I axed my signaF 15 ture.

o. e. TH. SALENIUS. 

